Publication: Movilidad de oxígeno en conductores iónicos A_(2)Ti_(2y)Zr_(y)O_(7) (A: Y, Gd)
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Publication Date
2004-07
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Moreno, K. J.
Mendoza-Suárez, G.
Fuentes, A. F.
Garcia Barriocanal, Javier
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Sociedad Española de Cerámica y Vidrio
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Abstract
Presentamos un estudio de la conductividad iónica en las series Y_(2)Ti_(2-y)Zr_(y)O_(7) y Gd_(2)Ti_(2-y)Zr_(y)O_(7) (0≤y≤2) obtenidas por síntesis mecanoquímica. Se presenta un estudio de la dinámica de iones oxígeno en estos materiales mediante la técnica de Espectroscopia de Admitancias. La variación con el contenido en Zr de la conductividad dc y de su energía de activación se interpreta en términos del aumento tanto del número de vacantes de oxígeno como del desorden en la estructura al aumentar el contenido en Zr.
We report a study of ionic conductivity in the series Y_(2)Ti_(2-y)Zr_(y)O_(7) and Gd_(2)Ti_(2-y)Zr_(y)O_(7) (0≤y≤2) obtained by mechanochemical synthesis. We present a study of oxygen ion dynamics in these materials by Impedance Spectroscopy. The change in dc conductivity and activation energy with Zr content is interpreted in terms of the increase in the number of oxygen vacancies and of structural disorder when increasing Zr content.
We report a study of ionic conductivity in the series Y_(2)Ti_(2-y)Zr_(y)O_(7) and Gd_(2)Ti_(2-y)Zr_(y)O_(7) (0≤y≤2) obtained by mechanochemical synthesis. We present a study of oxygen ion dynamics in these materials by Impedance Spectroscopy. The change in dc conductivity and activation energy with Zr content is interpreted in terms of the increase in the number of oxygen vacancies and of structural disorder when increasing Zr content.
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© Sociedad Española de Cerámica y Vidrio. Los autores del CINVESTAV-IPN agradecen a CONACYT el apoyo económico prestado para la realización de este trabajo (Proyecto 31198U). K. J. Moreno agradece al CINVESTAV-IPN el apoyo económico concedido para su estancia en la Universidad Complutense. Los autores de la Universidad Complutense agradecen el apoyo económico del MCYT (MAT 2001-3713-C04).
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